| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 324233000 | With phase sensitive element | 7 |
| 20080278154 | Device for Determining an Object, in Particular a Locating Device or Material Identification Device - The invention relates to a device for determining an object ( | 11-13-2008 |
| 20080290866 | METHOD AND APPARATUS FOR DIGITAL MEASUREMENT OF AN EDDY CURRENT SIGNAL - A method and apparatus for conducting eddy current testing of a test object is disclosed, comprising the steps of generating a digital drive signal, converting the digital drive signal to an analog drive signal to drive a coil in a probe; placing the probe in proximity to a test object; receiving an electromagnetic field generated by the test object, which generates an analog return signal; converting the analog return signal to a digital return signal; measuring the amplitude of the digital return signal; measuring the phase shift of the digital return signal compared to the digital drive signal; determining the phase shift angle of the digital return signal based on the phase shift; determining the quadrature components of the digital return signal based on the digital return signal amplitude and the phase shift angle; and analyzing the quadrature components of the digital return signal to determine a material characteristic of the test object. | 11-27-2008 |
| 20090021251 | BALANCING CIRCUIT FOR A METAL DETECTOR - A balancing circuit for a metal detector. The metal detector includes an oscillating power source, a transmit coil connected to the oscillating power source, first and second receive coils inductively coupled to the transmit coil, a first amplitude balancing circuit connected to the first receive coil, and a first phase balancing circuit connected to the first receive coil. The first phase balancing circuit includes a capacitor and a variable resistor. | 01-22-2009 |
| 20100102806 | ARRANGEMENT AND METHOD FOR INFLUENCING AND/OR DETECTING MAGNETIC PARTICLES IN A REGION OF ACTION - An arrangement for influencing and/or detecting magnetic particles, a method for adjusting such an arrangement and a method for influencing and/or detecting magnetic particles in a region of action is disclosed, which arrangement comprises selection means for generating a magnetic selection field having a pattern in space of its magnetic field strength such that a first sub-zone having a low magnetic field strength and a second sub-zone having a higher magnetic field strength are formed in the region of action, drive means for changing the position in space of the two sub-zones in the region of action by means of a magnetic drive field so that the magnetization of the magnetic particles changes locally, receiving means for acquiring signals, which signals depend on the magnetization in the region of action, which magnetization is influenced by the change in the position in space of the first and second sub-zone, wherein the receiving means comprises a first compensation means and a second compensation means the first and second compensation means comprising each a compensation coil. | 04-29-2010 |
| 20100117638 | MAGNETIC SENSOR AND SENSITIVITY MEASURING METHOD THEREOF - The present invention relates to a magnetic sensor with a sensitivity measuring function and a method thereof. Magnetic sensitivity surfaces detect flux density, and a switching unit extracts magnetic field intensity information of each axis, and inputs it to a sensitivity calculating unit. The sensitivity calculating unit calculates the sensitivity from the magnetic field intensity information about the individual axes from the magnetic sensitivity surfaces. The sensitivity calculating unit includes an axial component analyzing unit for analyzing the flux density from the magnetic sensitivity surfaces into magnetic components of the individual axes; a sensitivity decision unit for deciding the sensitivity by comparing the individual axial components of the magnetic field intensity from the axial component analyzing unit with a reference value; and a sensitivity correction unit for carrying out sensitivity correction in accordance with the sensitivity information from the sensitivity decision unit. | 05-13-2010 |
| 20100244818 | APPARATUS AND METHOD FOR TRANSDUCING AN IN VITRO OR MAMMALIAN SYSTEM WITH A LOW-FREQUENCY SIGNAL - Method and apparatus for generating and selecting low-frequency time-domain signals capable of transducing a mammalian system, to produce an agent-specific effect on the system, are disclosed. Low-frequency time-domain signals are generated in the presence of an injected magnetic stimulus, and the resulting signals are selected by a scoring algorithm, and optionally, by testing each signal identified by the scoring algorithm for its ability to produce an agent-specific response in a in vitro system containing components that are responsive to the agent. The selected signals are used to transduce the mammalian system by applying the signals to an electromagnetic transduction coil that holds the sample. | 09-30-2010 |
| 20110074401 | Apparatus and method for automatic product effect compensation in radio frequency metal detectors - A metal detector ( | 03-31-2011 |
